Hand-drawn Diagram

John Philip Trinkaus Drawing of Cat Ovary, 1938
Labeled drawing by Trinkaus of cat ovary, Embryology course, February 12, 1938
John Philip Trinkaus Drawing of Spermatozoa Formation, 1938
Labeled drawing by Trinkaus of four stages in the formation of spermatozoa (arphia), Embryology course, February 14, 1938
John Philip Trinkaus Drawing of Cat Ovary, 1938
Labeled drawing by Trinkaus of cat ovary, Embryology course, February 13, 1938
John Philip Trinkaus Drawing of Salamnader Testis, 1938
Labeled drawing by Trinkaus of salamander testis, Embryology course, graded A, February 7, 1938
John Philip Trinkaus Drawing of Rat Testis, 1938
Labeled drawing by Trinkaus of rat testis, Embryology course, February 13, 1938
John Philip Trinkaus Drawing of Grasshopper Testis, 1938
Labeled drawing by Trinkaus of Testis of Grasshopper (arphia), Embryology course, Feburary 14, 1938
John Philip Trinkaus Drawing of Squash Bug Testis, 1938
Labeled drawing by Trinkaus of testis of Anasa tristis (squahs bug), Embryology course, graded A-, February 18, 1938
John Philip Trinkaus Drawing of 48 Hour Chick Embryo, 1938
Labeled drawing by Trinkaus of 48 hour chick, Embryology course, graded B+, April 13, 1938
John Philip Trinkaus Drawing of Unknown Organism Embryo, 1938
Labeled drawing by Trinkaus of unknown organism embryo, Embryology course, graded A-, May 1, 1938
John Philip Trinkaus Drawing of 72 Hour Chick Embryo, 1938
Labeled drawing by Trinkaus of 72 hour chick, Embryology course, May 1, 1938
John Philip Trinkaus Drawing of 72 Hour Chick Embryo, 1938
Labeled drawing by Trinkaus of 72 hour chick, Embryology course, May 2, 1938
John Philip Trinkaus Drawing of 21 Hour Chick Embryo, 1938
Labeled drawing by Trinkaus of 21 hour chick embryo, Embryology course, graded A, March 19, 1938

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